Mill-lam p



(No Model.)

. 'P. WALL.

- Mill-Lamp;

W- Patented. J u n Unrrn sagas Arena PATRICK WALL, OF ALLEGHENY, PENNSYLVANIA.

MILL-LAM P.

SPECIFICATION forming part of Letters Patent. No. 228,497, dated June 8, 1880.

Application filed April 17, 1880.

To all whom "it may concern Be it known that l, PATRICK WALL, of Allegheny, county of Allegheny, and State of Pennsylvania, have invented a new and useful Improvement in Mill-Lamps; an d I do hereby declare that the following is a full and exact description thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon.

Hy invention relates to an improvement in that class of lamps known as mill-lamps or torch-lamps, and it consists in providing it with three wick-tubes, a detachable burner, and a means for conveying the waste or unconsumed oil back into the body of the lamp, the central wick-tube having a central air-inlet extending from near the bottom of the lamp up through the body of it to the top edge of the wick-tube, the whole being constructed, arranged, combined, and operating as hereinafter described.

To enable others skilled in the art with which my invention is most nearly connected to make and use it, I will proceed to describe its construction and operation.

In the accompanying drawings, which form part of my specification, Figure 1 is a side elevation of my improvement in mill-lamps or torch-lamps. Fig. 2 is a vertical section of the same at right angles to the detachable burner. Fig. 3 is a top view of Fig. 1. Figs. 4 and 5 are end and side elevations, respectively, of the detachable burner.

In the accompanying drawings, A represents the body of the lamp; B G, the side wicktubes, which are braced and stayed at their upper ends through the medium of the pieces D D, one of which serves the double purpose of brace and conductor for conveying the unconsumed oil back into the body of the lamp. The outer ends of the braces D D surround the wick-tubes B 0 near their upper edge, and are dished, so as to form receptacles for the waste or unconsumed oil which flows over the upper edge of the wick-tubes B and G, which flow of oil will be in proportion to its specific gravity, the overflow always being greater when light.

The brace D, where it surrounds the wicktube (1, forms a circular dish, 0, (shown in Figs. 1 and 3,) which does not communicate with (No model.)

the body A of the lamp through the medium of a channel made in the brace, like that shown at f in Figs. 1 and 3; but I wish it understoodthat the wick-tubes Band C may be furnished with either form of the braces and dished receptacles for the waste oil and come within my invention.

The center wick-tube, E, is attached to the lid F of the lamp by means of an ordinary screwcap, as shown at g in Fig. 2. This wick-tube is provided with a central air-flue, H, which extends from the top edge of the wick-tube E down through it, the body A of the lamp being curved at i and its lower end secured to the side of the body and near its bottom j.

The detachable burner G consists of four inclined walls, 70, Z, m, and n, which converge toward a common center,the lower edge of the walls 75 and n being connected to two arms, 0 p, which terminatein a sleeve,which is fitted to the wick-tube E, for holding the burner G in position with relation to the upper end of said wick-tube.

The bottom or under side, 1", of the burner Gis provided with an annular opening, through which the wick-tube E passes. This opening is sufliciently large to leave a space around the wick-tube for the admission of air to the burnin g wick.

The body of the lamp is provided with lugs s for the bail t, which is of ordinary construction.

Mill-lamps are usually constructed of thin sheet-iron; but I prefer using sheet-iron of No.20 to 22 gage, and braze the seams. Such construction of lamp will be much stronger, more durable, and less liable to leak oil.

The operation of my improvement in milllamps isas follows: The wick-tubes being supplied with wick and the lamp filled with oil, the wicks are then lighted, and the burner G is then placed on the wick-tube E, as shown in Figs. 1 and 2, which will cause the flame of with the burner G for a stationary light, which is often required in a rolling-mill when making repairs.

When the lamp is used for a moving light the wicks in the tubes B and O are lighted.

The wick often carries up more oil than. the flame consumes. The overflow or uneonsumed oil flows down into the dish around the wick-tube,w11ere it becomes heated and nited, thereby causing an increase of the flame of the lamp, and any oil that is not consumed by the flame is returned to the body of the lamp through the medium of the conductingchannel f in the brace D, thereby preventing the overflow oil from running down the exterior sides of the lamp, which is a very objec tionable thing in a mill-lamp.

Having thus described my improvement, what I claim as of my invention is- 1. In a mill-lamp, the combination of a lid shaped receptacles around the upper ends of the wick-tubes, lid F, provided with the detachable wick-tube E, having a central air-flue, II, and a detachable burner, G, provided with inclined sides 7.: l m n and arms 0 p, terminating in a sleetc, substantially as and for the purpose specified.

PATRICK WALL.

\Vitnesscs A. O. J oI-INsroN, J. J. JOHNSTON. 

